The term 'has a duty to (do)' can be summarized as having an obligation to fulfill a certain task. This is often seen in job descriptions, where an employee is expected to complete certain tasks and duties in order to fulfill their role. The crossword solution for this term is 'SHOULD', which implies that the person has a responsibility to do something. This could be anything from completing a project to attending meetings or following company policies. Ultimately, it means that the person is expected to fulfill their obligations in order to do their job properly.